Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem eram os candidatos no distrito Wisconsin 4?
 ###Tabelas: CREATE TABLE louisiana_parishes_ranked_by_per_capita_income (louisiana_parishes_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, Parish VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE full_international_caps_and_goals (full_international_caps_and_goals_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Result VARCHAR, Goals INT, Competition VARCHAR) CREATE TABLE wisconsin (wisconsin_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected INT, Results VARCHAR, Candidates VARCHAR) CREATE TABLE episode_list (episode_list_id AUTO_INCREMENT PRIMARY KEY, Series # INT, Season # INT, Title VARCHAR, Director VARCHAR, Writer(s) VARCHAR, NBC Airdate VARCHAR, Code INT) CREATE TABLE south_carolina (south_carolina_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected VARCHAR, Result VARCHAR)  
SELECT Candidates FROM wisconsin WHERE District = Wisconsin 4